Question: What domain is doctoral supervisor of Yurii Vladimirovich Egorov?
Paraphrase: Yurii Vladimirovich Egorov's doctoral supervisor's domain is what?
SPARQL (Wikidata): SELECT ?answer WHERE { wd:Q23655951 wdt:P184 ?X . ?X wdt:P101 ?answer}
Answer: applied mathematics, topology, mathematical physics, partial differential equation, algebraic variety, Dirichlet problem, elliptic differential equation, theory of elasticity